Tool support for metal-cutting machines



June 1 1926.

R. s. CROSBY4 TOOL' vSUPPORT FOR METAL CUTTING MACHINES s'nd sept. 21, 1922 Patented .lune l, 1926.

UNETED STATES Lssaau Partnr oFF-ics."

REUBEN S. CROSBY, OF VHARLOIRI), CONNECTICUT, ASSGNOR TO THE ASA S. COOK COMPANY, OF HARTFORD, CONNECTCUT, CORPORATION CONNECTICUT.

TOOL STIPILOR'T` FOR METAL-CUTTING MACHINES.

Application iled September 21, 1922. Serial No. 589,595.

lvly invention relates to the class `of devices employed for holding tools for cutting operations upon articles usuallyfmovably supported with respect to such tools, and an object of the invention, among others, is to provide a tool holder" fof `this class in which extreme accuracy is notrequired in grinding the tool, for` any series o-'operations,the device possessing means whereby the tool may be set to provide the proper cutting angle; and another object oir the invention is to provide a tool in the use ot which the results as to finish shall be of a high grade.

One form of device embodying my invention and in the construction and usek of which the objects herein set out, as well as others, may be attained, is illustrated in the accompanying drawings, inwhich- Figure 1 is a view of a portion of a ma chine equipped with my improved tool sup.- port, the latter being shown in side elevation. l

Figure 2 is a view similar yto Figure 1, but showing `my improved tool support as viewed from the top, the tool actuating mechanism being removed.

Figure 3 is a detail view illustrating` the constructionand arrangement of the too supporting arbor and sleeve. 1

In the accompanying drawings the numeral 5 indicates a portion of the frame ofV a metal cutting machine, the special type herein-'shown being for shaving the heads ot bolts, such machine comprising a spindle having ya chuck 6 in which a bolt 7 is clamped 'or cutting operations of the tools, a baclr rest 8 being provided for the bolt during such cutting operation.

In carrying my invention into effect 1 provide a tool supporting arbor 9 that is secured in portions or' the frame of the Inachine in any suitable manner, this arbor being preferably rotatably adjustable. A `tool sup-porting sleeve 10 is mounted on the arbor 9 and is preferably rotatably adjust'- able therewith. A tool supporting arm 11 rises from the tool supporting sleeve, and this arnr. supports a tool post arbor 12, in the form of device herein illustrated and described there being an arbor. 12 located on each side of lthe arm 11. These arbors are of the chuck and also to the arbor 9, as

clearly illustrated in Figures 2 and 3 of the drawings. A tool post sleeve; 13 is rotatably mounted on each of the toolpost arbors 12,

and a tool post or holder 14 extends later? ally from eachtool post sleeve.

Any lsuitable means may be 'employed for securing cutting tools- 15-16 to the tool posts, as illustrated herein such means comprising a groove 17 in each post closed bya clamping cap for securing the tool in place. Either or both of the tools may have a stop 19 adjustably secured to the tool kholder and'for'the purpose of locating the end of the cutting tool in properposi tion. i

ln, the cutting or" articles of this class, as lis well understood, the end .20 oi each tool is formed` atl a certain angle with respect to the work being operated upon, this angle being formed by grinding, and it is essential to proper operation that the surface Vcomprising the end 'of the tool shall be properly positioned with respect to the work being operated upon. `l/Vh'en this angle is .determined by grinding the tool much skill is required inA such grinding. By the ma be ,Swuno on two axes to wit: the axis o'f the arbor'9, when the latter is loosened,

andthe axis of the arbor 12, which latterv may be termed an angle determining axis. By thus arranging the parts the tool may be ground to approximately the Viorm desired, accuracy, however,- not being required, as this accuracy may be obtained when the tool is placed. in the tool holder by swinging the arm 11 on the axis of the arbor 9, in either direction, as the conditions may require, the point or the tool remaining in contact with the work and the structure breaking at the joint of which the arbor 12 forms a part, it being understood that the arbor 9 has been loosened for this purpose. By this means the end 2O of the tool may be located at the proper angle with respect to the work being operated upon and when so located the arbor 9 may be secured in place, and the axis of the arbor 9 may, therefore, be termed a tool positioning axis. 1f. required the tool may also be adjusted as to its position lengthwise ci the groove 17.

A material advantage is gained by arrangpletedand the tool moves back'it immediately *leavesl the surface upon which it had been operating-and such surface is, therefore. maintained in a practically finished condition,Vivithout marks VWhich would be left Ashould the tool move alongl such cutting surface, as in the case of a tool that moves forward and backward at right angles to the axis of the Work.

In effecting the movements Lof the tool toward Aand from the Work a strut 21 is engaged Within a socket on a. stud22 on vthe tool holder,an adjustingA screw 23 engaging Within a socket in the end of the strut. The screw 28 fits a screw threaded hole in atool actuating arm 24 secured to a tool actuating spindle 25 that may have a partial rotation to and fro imparted to it by means of an arm and cam not herein shown,` as the construction andoperation ofsuch will be readily understood. The strut 21 is yieldingly held in place as by means of a "spring 26 secured at the end of the arm 24 and also to a stud upon the tool post 14, as shown in Figure 1 of the drawings. l

In accordance with the provisions ot' the patent statutes I have described the principles of operation ot' my invention, together With the device which I now consider to represent the bestembodiment thereof; but I desire to have it understood that the device shown is only illustrative and that the invention may be carried out by other means andapplied to uses other than those above set out.

I claim---y Y n 1. A tool supporttor metal cutting machines, said support comprising a member rotatably adjustable on a tool positioning axis, a tool post mounted in an inclined position on an inclined angle determining axis on said member, and rotatably adjustable thereon, and `means `for securing Aa tool to said post.

2. A tool support for metal cutting machines, 'said"supportcomprising a member rotatably adjustable, a tool post adjustably rotatably mounted on an axis inclined with respect to the axis of said member, and means for securing a tool to said post.

3. A tool support for metal cutting machines, said support comprising a member rotatably` adjustable, a stud projecting from said member at an angle to the axis of said member, a tool post rotatably adjustably mounted on said stud, and means for securing a tool in said tool post.

4. In combination With the Work spindle ot a metal cutting machine, a tool support comprising a member rotatably adjustable on an axis inclined with respect to the axis of said Werl; holding spindle and means for rotatably supporting` said member on an axis substantially parallel With said Work spindle. y

5. A tool support for metal vcutting machines, said support comprising a supporting arbor, a sleeve rotatably adjustably supported by said arbor, an arm projecting laterally from said sleeve, a stud projecting at an angle to said arm, a tool post rotatably adjustably mounted on said arm, and means for securing a tool to said tool post.

6. A tool support for metal cutting machines, said support comprising an arbor, a-

sleeve rotatably adjustably supported by said-arboryan arm projectingjlaterally from said sleeve, studs projecting laterally from said arm on opposite sides thereof and at an inclined angle thereto, a tool support ad-l REUBEN S. CROSBY. 

